Switch mechanism



Feb. 14, 1928.

H. K. ANSINGH SWITCH MECHANISM 2 Sheets-Sheet 2 Filed Feb. 20, 1923INVENTOR Herman K. Ans'mgh M ATTORNEY Patented Feb. 14, 1928.

UNlTED STATES PATENT @FFEQE.

HERMAN K. ANSINGH, OF TORONTO, GNTABIO, CANADA, ASSIGNOB- T0 \VESTING-HOUSE ELECTRIC &, MANUFACTURING CUMPANY, A CORFOB-ATION OF PENNSYL-VANIA.

SWITCH MECHANISM.

Application filed February 20, 1923.

My invention relates to switch mechanism and particularly to circuitbreakers ot the safety type wherein the circuit breakers anddisconnecting switches are enclosed within a metal housing.

One object of my invention is to provide a tulhsafety circuit breakerwherein the breaker is placed within a separate compartment of a housingcontaining separate disconnecting-switch compartments and wherein asingle door serves .to close all of the compartments.

Another object of my invention is to provide an enclosed circuit-breakermechanism, having the above characteristics, wherein the circuit breakeris so interlocked with the disconnecting switches that the latter cannotbe actuated so long as the circuit breakor is in closed position andwherein the door closing all compartments is so interlocked with thedisconnecting; switches that the latter cannot be actuated to closedposition so long as the door is in open position and the door cannot beopened so long a the dis connecting switches are in closed position.

Another object of my invention is to provide a simple and inexpensiveinterlocking means between the circuit breaker and the disconnectingswitches and between the latter and the door for the housing.

Another object of my invention is to provide a circuit-breaker mechanismwherein the disconnecting switches connected to opposite sides of thecircuit breaker are so connected that actuation of one causes acorresponding movement of the other.

These and other objects, that will be made apparent throughout thefurther description of my invention, will be attained by means of theapparatus hereinafter described and illustrated in the accompanyingdrawings, wherein: s

Figure 1 is a side elevational view oi? a full-safety enclosed circuitbreaker, a side wall being" removed;

Fig. 2 is a rear elevational view of the circuit breaker shown in Fig.1, the door being removed;

Fig. 3'is a transverse section through the circuit breaker mechanismtaken on the line III-III-of Fig.1; and

Fig. i is an elevational view of a disconnecting switch shown in largerscale.

Referring to the drawings, tl e app ratus Serial No. 620,143.

includes a sheet-metal housing having a front wall 6, side walls 7 and arear door 8 that is hinged to one of the side walls by hinge members 9.The housing is divided into a bus-disconnecting-switch compartment 11, acircuit-breaker compartment 12 and a feedcr-disconnecting-switchcompartment 13 by switch and contact-membersupporting partitions 14: and15.

The door 8 serves to close all of the compartments. but theclisconnecting -switch compartments 11 and 13 are additionally providedwith closure plates 16 and 17. respectlve y, that are detachably mountedin the framework of the housing; and may he removed by the operator whenaccess to the said compartments is desired. It will be seen, therefore,that, when the door is open. the circuit-breaker compartment 12 isimmediately accessible.

The circuit breaker illustrated is otstandard oil-immersed type enclosedwithin a tank 18 that is supported upon a bracket 19 which is secured tothe front "all of the compartment 12 by means of bolts 21. The circuitbreaker, as shown in Fig. 1, is in closed position and is adapted to beactuated by an operating lever 22 that is pivoted upon a shaft 23 andconnected to a link which, in turn, is pivoted to lever 25 tha isconnected. at one end, to the bracket 25 carrying the circuit-breakercontact memhers and, at the other end, to a pivot shaft 27. i

It will be seen from the foregoing that. when the operating handle ismoved upwardly, the bracket 26, carrying the circuit breaker Contactmembers, will be moved downwardly to its open position.

The bus-disconnecting; switch and feeder-disconnecting switch areidentical in construction with the exception. of certain interlockingdevices that are preterably connected to the bus-illsconnecting switch.The disconnecting switch 28 is oi standard construction and comprises 2.meta1 bracket 31 that is secured to the partition 14:. The bracketcarries three pairs of in sulating bushings 82 for a three-pole systemand upon one bushing or" each pair is mounted the break-jaw members 33,while, upon the other bushing of each pair, is mounted the hinge-jawmembers 34; of the disconnecting switch.

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i in

The disconnecting switch blades 35 are pivoted to the hinge-jaw membersand are rotatably movable into engagement with the break-jaw membersEach blade member 35 is connected to an 'operatinglink 36 that ispivoted to a le -i 37 secured to an operating shaft- 38 having hearingson the bracket 31. One end of the shaft 38 carries an inter lockingquadrant 35) while theother is provided with a flanged coupling memberll to. which a flanged socket member 42 detachably secured. 'ihe socket4:2 projects exteriorly of the door 8 through openings 13 in the plate16 and the door 8. The socket is for the )uriose of IGCGIVHIQ adetachable handle thatis inserted within the socket for o aeration ofthedisconnectin switch.

Referrin to hi s; 1 and d the uadrant 39' is of such shape'and proportons as to be movable to opposite sides of an nterlocking rod 45 that isconnected to the circuit-lireaker1leverf25-through the medium of rockingcranks 46 and i7 secured to a rocking shaft 48 that is pivoted to theunder side of the partition 14, and a connecting link 49 that ispivotally attached to the crank i7 and the lever 25. i r i {As indicatedin Figs. 1 and 4, the rod a5 is in the raised position that itoccupieswhen 7 Opening movement 51 of the quadrant 'itcleai's the Quadrant 39.

is in closed position. of the disconnecting prevented by the end thecircuit breaker switch blades is upperend of the rod tathat supported ina gui'de .52 on the frame 31. -llierefore, the disconnectingswitch-blade members cannot be mov'ed to their open positions so long asthe circuit breaker is' in closed position.

lVhen the circuitbreaker has been moved to open positiomthe rod lf) islowered until 'Ihe; disconnecting switch'may then be opened.

lVhen the disconnecting switchfis in open position, thequadrant -39occupies a position on the right side of the interlocking rod d5corresponding to the position indicated in dotted lines in Fig. 4,showing the quadrant at the left side of the rod. 7 r

If the circuit breaker is moved to closed,

position after the disconnectingswitch has been moved to o Jen Jositionthe Quadrant 39 again prevents closing movement of the disconnectingswitch blade, therefore precludmg any possibility of the disconnectingswitch being actuated while the circuit breaker is closed. V The door 8is interlocked with'the disconnecting switch by means of a clip 53having a projection 54 that 'occupies a position behindthe flange member41 when the door is in closed position. The flange member is providedwith a crank arm oohaving a lug 56 which constitutes a stop shoulder 57,the purpose of which will be hereinafterdescribed. V

39 which; engages the When the disconnecting switch is in closedposition, the crank arm 55 and the lug 56 e2;- tend infront of theprogect-mn 54 and prevent op ening movement of the door so long as thedisconnecting switch is in closed position.- When the disconnectinswitch isin open position, the crank ai'in' a5 and the lug 56 clear theprojection 541' and. ing movement of the door.

' Closing movement of the disconnecting switch, while the dooris'open,is prevented by means of a pivoted pawl member 58 that permit openisnormally pressed outwardly into the plane of the shoulder 57 on theflange memberltl by a spring 59. .lVhen the disconnecting switchis movedto open position, the pawl member 58 engages the'shoulderh'i' andprevents closing movement of the disconnecting nect-ing switch 29 whenthe disconnecting switch 28 is actuated. The bus-disconnect in switch isconnected to the circui t breaker by means of conductors 63, insulatingbushings 64 and conductors 65; The disconnecting switch 29 is connectedto the opposite side of the circuit breaker by means of con du'ctors66,a series transformer 67, conductors 68, insulating bushings 69 andconductors 71.

It will be apparent from the foregoing that the disconnecting switchescannot-be actuated so long asthe circuit hreakeris in closed positionand the circuit breaker'cannot be actuated except when the disconnectingswitch is in either its on or its off position. The door ClOSiD accessto all coinpartments is locked in closed position so long as thedisconnecting switchlis in closed posit-ion, and the disconnectingswitches cannot be actuated so long-as the door is open. It is,therefore, impossible; for an opera r to gain access tothe' circuitbreaker until the disconnecting switches have been'opened,

and it is impossible forthe'operator to close the disconnecting switcheswhile the' circuit breaker is in closed position.v Full safety istherefore afiorded by the construction above disclosed.

In certain installations, it maybe desirable where feederdisconnecting.switches are unnecessary, to use the lower compartment 13for containing the potential transformers and their incidentalequipment. Therelative positions of the disconnecting switch and'thecircuits may bewaried in accordance with the nature otthe installation.Instead ofv using .a permanent plate for tlr pfront; o 1

the housing, a hinged door may be substituted having an opening throughwhich the circuit-breaker handle may operate.

hile i have described and illustrated but one embodiment of myinvention, it will be apparent to those skilled in the art that variouschanges, modifications. substitutions, additions and omissions may bemade therein without departing from the spirit and scope of myinvention, as set forth in the appended claims.

I claim as my invention:

1. Switch. n'iechanism comprising a housing divided into threecompartments, a circuit breaker in one compartment and a dis connectingswitch in each of the other c0mpartments, a single door for closing allcompartments, a means for actuating the circuit breaker interlocked withone of the said disconnecting switches whereby opening movement of thecircuitbreaker is precluded except when the said disconnecting switch isin either of its on or off positions, and means for connecting the saiddisconnecting switches whereby movement of one disconnecting switchcauses corresponding move ment oi the other.

2. Switch mechanism comprising a circuit breaker, a disconnecting switchconnected on each side of the circuit breaker, means for actuating thecircuit breaker interlocked with one of the said disconnecting switcheswhereby opening movement at the circuit breaker is precluded except whensaid disconnecting switch is in either 0t its on or off positions, oropening or closing movement of the said disconnecting switch isprecluded so long as the circuit breaker is in closed position, andmeans for connecting the said disconnecting switches whereby movement ofone disconnecting switch causes a corresponding moven'ient of the other.

Switch mechanism comprising a housing divided intotwo con'ipartments, acircuit breaker in one compartment, a disconnecting switch in the othercompartment, a door for closing both compartments, means for sointerlocking the circuit breaker with the disconnecting switch thatclosing movement of the former is precluded except when the latter is inon or off position, and means for preventing opening movement of the ingdivided into two compartments, a circuit breaker in one compartn'icnt, adiscon necting switch in the other compartment. :1 door for closing bothcompartments, means tor so interlocking the circuit breaker with thedisconnecting switch that the latter cannot be actuated so long as thecircuitbreaker is in closed position and means for so interlocking thedoor and the (:lisconnectingswitch that the latter cannot be moved toclosed position so long as the door is open.

6. Switch mechanism comprising a housing divided into threecompartments, a circuit breaker in the middle compartment, adisconnecting switch in each of the other compartments connected toopposite sides of the circuit breaker, means for preventing theactuation of one disconnecting switch so long as the circuit breaker isin closed pest tion and means for connecting the said disconnectingswitches whereby movement of one thereof causes a corresponding movementof the other.

7. Switch mechanism comprising a. housing divided into two compartments,a circuit breaker in one compartment, a disconnecting switch in theother compartment, a door: for closing both compartments, and a latchfor normally preventing closing movement; of the disconnecting switchand actuated by the door to releasing position when the door is moved toclosed position.

In testimony whereof I have hereunto subscribed my name this ninth dayof February,

HERMAN K. ANSINGH.

